Receiving apparatus for electrical impulses



Jan. 3l, 1933. P, w. LYTH RECEIVING APPARATUS FOR ELECTRICAL IMPULSES Filed Oct. 2, 1930 N .wi

f7 rroR /viys Patented Jan. 3l, 1933 PATENT OFFICE PAUL WILHELM LYTH, or LIDINGo, SWEDEN RECEIVING APPARATUS FOR ELECTRICAL IMPULSES Application led October 2, 1930, Serial No. 485,943, and in Sweden IFebruary 6, 1930.

This invention relates to means for receiving electrical impulses, particularly applicable to signalling apparatus, or to apparatus or indicating from distant places, for instance 5 in connection with logs or other instruments.

In receiving apparatus of this kind the impulse generally has to pass through the Windings of an electromagnetic device, which attracts an anchor. The current impulse ceasing, the anchor returns to its initial position by the action of a spring or a counterweight. The oscillations of the anchor generally are transmitted to an indicating device by means of a spur gear, the indicator or hand of said device being imparted a certain amount of motion for each impulse. Should it be desired to alter said amount of motion, imparted to the indicator for each impulse, the dimensions of the spur gear or the means for transmitting the motion to said spur gear must be changed. Such changes always involve considerable trouble. Exact adjustment is always desirable but may not possibly be acquired with changes of this kind. Then the only way available is to change the interval of the impulsein the sending apparatus to suit exactly the conditions of the receiving apparatus. However, also this procedure is liable to cause trouble and, in many cases, is even impossible in practise.

lith my present invention the drawbacks mentioned above are essentially eliminated. The accompanying drawing illustrates two preferred forms of my invention. Figure 1 zontal section ofthe receiving device adapted to be combined with an indicating device. Figures 3 and 4 illustrate another form of the combination in question, Figure 3 showing the same partly in vertical section and Figure 4 a horizontal section of the apparatus.

A soft iron core 1 is surrounded by two coils 2, which are connected to an electric impulse arrangement, not shown. An anchor 3 is secured to a. shaft 16, supported in bearings 15 secured to the base plate 19 as shown in Figures 1 and 2. An impulse passing through coils 2, one end of said anchor is attracted by the iron core 1. Said core, when shows a vertical view and Figure 2 a horithus being brought into a magnetic condition, induces magnetic poles in anchor 3. A soft iron plate 4, secured to a shaft 14, rotatably mounted and longitudinally movable in a bushing 17, is then attracted by anchor 3. Shaft 14 is in driving connection with an indicating device, not shown. Between anchor 3 and plate 4 there is normally a clearance, and the movement of the plate towards the anchor is counteracted by a spring 6. 50 Thus plate 4 forms an electromagnetic coupling between the anchor 3 and the indicating device. The anchor 3 is provided with a counterweight 11, at the same time serving as a stop in order to limit the movements of the anchor, and to this effect butting up against a stop screw 12. In order to soften the stopping action a spring 111 is interposed between the stopping surface of the counterweight and the screw, in the arrangement shown in Figure 1 the spring being secured to the counterweight. By turning the screw the turning angle of the anchor may be altered. The plate 4 being attracted by the anchor, the turning angle of the plate is subject to the same alterations as the turning angle ot the anchor. The plate 4 is connected to the indicating arrangement, thus a variation of the oscillating angle of the anchor will cause the movements of the indicator to be correspondingly altered. The adjustment thus imparted to the indicator by turning the screw 12 apparently will turn out to be extremely sensitive.

In Figures 3 and 4 another form of the ar- 85 rangement of the anchor is illustrated. In this form the attractive force between the anchor 31 and the plate 4 is increased by an additional electro-magnetic device. The anchor 31 is arranged to be acted upon at both 90 ends by magnets 21, both extending from the core 1 and surrounded by coils Q. The additional device mentioned above consists of an electro-magnet 13, secured to the anchor 31, the whole being secured to a plate Q0 as shown 95 in Figure 4. The coil of this magnet is coupled in the circuit of the receiver in such a manner that the impulses passing through the circuit of the received wholly or partly passes through the coil of magnet 13. Slightly before the commencement of the movement of anchor 31, the magnet 13 will attract the soft iron plate 4 and when slightly afterwards the anchor commences its movement the plate will move together with the anchor. The movement of pla-te 4 is imparted to the indicating device (not shown in the drawing) by means of a small pinion wheel 18. The impulse ceasing, a spring 6l pulls the light plate 4 away from the anchor 31, before the spring 5 will be able to restore the comparatively weighty anchor to its initial position. Thus the return movement of the `anchor will not influence the indication device. In crder to still more secure this operation the spring 61 may be designed to perform a braking action on the turning shaft 14 of plate 4. This may be achieved by having a hole in the spring, through which hole the shaft 14 is carried, a close dimension with regard to the shaft, so as to create friction between the spring and the shaft. Then in consequence the spring 5 will not be able Ito turn the anchor 31 until the plate 4 has left the anchor. In this form of the invention the oscillating movements of the anchor are limited by an extending member 10 co-acting with a stop 9, said stop being designed as a spring in order to soften the stopping action. The spring is arranged on a supporting rod 24 Vand has two free ends as shown in Figure 3.

One of these ends Vco-acts with member 1() and the other butts up against an eccentric disc 7 on a pin 8 provided with a suitable handle or some other turning device. By

.turning the pin 8 and disc 7 the oscillating angle of the anchor 3l may be varied. Supporting rods 23 are arranged to keep the magnets 21 secured to base plate 20.

The details of the invention may be varied as to size, shape, material and general arrangement without departing from the range of the invention.

Vhat I claim is 1. In a stepby-step ymechanism for translating electrical impulses to mechanical impulses, an electromagnet adapted intermittently to be energized by said electrical impulses, an armature member tiltably mounted adjacent to said electromagnet and adapted to be attracted by the same at each energization thereof, means for tilting back the armature member upon de-energization of the electromagnet, a disc means capable of rotational and axial movements mounted adjacent to the arma-ture member and adapted to be attracted by and frictionally to engage with the same instantly upon each energization of the electromagnet in order to cause the disc means to partake of the angular movement of the armature member, and means for interrupting' the frictional engagement be tween the disc means and 'the armature member instantly upon each cle-energization of the electromagnet.

2. In a step-bystep mechanism for translating electrical impulses to mechanical impulses, an electromagnet adapted intermittently to be energized by said electrical impulses, an armature member tiltably mounted adjacent to said electromagnet and adapted to be attracted by the same at each energization thereof, means for tilting back the armature member upon de-energization of the electromagnet, a disc means capable of rotational and axial movements mounted adjacent Ito the armature member and adapted to be brought into frictional engagement with the saine instantly upon each energiza tion of the electromagnet in order tocause the disc means lto partake of the angular movement of the armature member, means for interrupting the frictional engagement between the disc means and the armature member instantly upon de-energization ofthe electromagnet, and resilient and 'adjustable 'means for limitation of the tilting movement of the armature member and for variation of 'the angle of said movement. Y

' 3. In a step-by-step mechanism for translating electrical impulses to mechanical impulses, an electromagnetadapted intermittently to be energized by said electrical impulses, an armature member tiltably mounted adjacent to said electromagnet and adapted to be attracted by the same at each energization thereof, coils mounted on said armature member and adapted to be passed by said electrical impulses, means for tilting back the. armature member upon cle-energizationV of the electromagnet, a disc means capable of rotational and axial Vmovements mounted advjacentto Ithe armature member and adapted frictionally to engage with the same instantly upon energization ofthe electromagnet in order to cause the disc means to partake of the angular movement of the armature member,

and means for interrupting the frictional engagement between the disc means and the armature member instantly upon de-energr zation of the electromagnet.

4. In a step-by-step mechanism for translating electrical impulses to mechanical impulses, an electromagnet adapted intermittently to be energized by said electrical impulses, an armature member tiltably mounted adjacent to said electromagnet and adapted to be attracted by the same at each energization thereof, means for tilting back the armature member upon de-energization of the electromagnet, a discmeans capable of rotational and axial movements mounted adjacent to the armature member and adapted to be attracted by and frictionally to engage with the same instantly upon each energization of the electromagnet in order to cause the disc means to partake of the angular movement of the armature member, means for interrupting the frictional engagement between the disc means and the armature 5. In a step-by-step mechanism for translating electrical impulses to mechanical impulses, an electromagnet adapted intermittently to be energized by said electrical impulses, an armature member tiltably mounted adjacent to said electromagnet and adapted to be attracted by the same at each energization thereof, coils mounted on said armature member and adapted to be assed by said electrical impulses, means for ti ting back the armature member upon de-energization of the electromagnet, a disc means capable of rotational and axial movements mounted adjacent to the armature member and adapted frictionally to engage with the same instantly upon each energization of the electro-magnet, means for interrupting the frictional engagement between the disc means and the armature member instantly upon de-energization of the electromagnet, and resilient and adjustable means for limitation of the tilting movement of the armature member and for variation of the angle of said movement.

6. In a step-by-step mechanism for translating electrical impulses to mechanical impulses, an electromagnet adapted intermittently to be energized by said electrical impulses, an armature member tiltably mounted adjacent to said electromagnet and adapted to be attracted by the same at each energization thereof, means for tilting back the armature member upon de-energization of the electromagnet, a disc means capable of rotational and axial movements mounted adjacent to the armature member and adapted frictionally to engage with the same instantly upon each energization of the electromagnet in order to cause the disc means to partake of the angular movement of the armature member, means for interrupting the frictional engagement between the disc means and the armature member instantly upon de-energization of the electromagnet, resilient and adjustable means for limitation of the tilting movement of the armature and for variation of the angle of said movement, and means controlled by the disc means for exerting a bra-king action on the armature until the frictional engagement between the same and the disc means has been interrupted.

7. In a step-by-step mechanism for translating electrical impulses to mechanical impulses, an electromagnet adapted intermittently to be energized by said electrical impulses, an armature member tiltably mounted adjacent to said electromagnet and adapted to be attracted by the same at each energization thereof, coils mounted on said armature member and adapted to be passed by said electrical impulses, means for tilting back the armature member upon de-energization of the electromagnet, a disc means capable of rotational and axial movement mounted adjacent to the armature member and adapted rictionally to engage with the same instantly upon energization of the electromagnet, means for interrupting the frictional engagement between the disc means and the armature member instantly upon de-energization of the electromagnet, resilient and adjustable means for limitation of the tilting movement of the armature member and for Variation of the angle of said movement, and means controlled by the disc means for exerting a braking action on the armature until the trictional engagement between the same and the disc means has been interrupted.

In testimony whereof I have signed my name to this specification.

PAUL WILHELM LYTH. 

